JPS63206520A - In-situ slope framing work using simple trapezoidal formwork - Google Patents

Abstract

PURPOSE:To construct strong slope frames by a method in which simple trapezoidal formworks of comb-shaped sides and a netted ceiling are set in a grating from on a net laid on slope and cement mortar is sprayed onto them. CONSTITUTION:A metal net 4 is laid over the whole surface of slope 30, simple trapezoidal formworks 3 so comb-shaped sides and a netted ceiling are set in a grating form, and several reinforcing bars 5 are set. Cement mortar or concrete of a low slump value is sprayed into the formworks 3. Since the spraying width of the mortar can thus be made clear and reinforcing bars can be on the center, slope frame of high strength can be formed.

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention is an invention of a method for constructing a cast-in-place frame that is easy to construct and has strength that meets standards. .

(Conventional technology and its problems) Traditionally, slope surfaces (formwork made of Kokrin Plus, water-resistant cardboard, plastic, etc. are placed in a grid pattern, and low-slump mortar or concrete is sprayed into the formwork. The method of constructing a cast-in-place lattice frame has been contracted out and is being constructed in various locations.

However, in these methods of construction, since there is no place for the sprayed mortar or concrete to scatter within the formwork, the sprayed mortar, etc. tends to become millet-like and result in a framework lacking in strength.

In addition, because the vertical width of the formwork is wide, it has the disadvantage that it is difficult to follow the unevenness of the slope.

Therefore, in order to solve the drawbacks of the conventional cast-in-place method, the applicant previously proposed in Japanese Patent Publication No. 58-20338, etc., by placing a mesh on the slope and arranging reinforcing bars on top of it.
He proposed a method of forming a legal frame by spraying mortar etc. on top of it, and has produced many results to date.

However, this method of construction also had the following drawbacks.

The width of the mortar etc. to be sprayed is not clear and the hem cannot be determined, so the width of the frame varies, making it impossible to create a cast-in-place frame that meets the standards for the frame.

In addition, since the wire mesh is stretched directly on the slope and the reinforcing bars are placed on top of it, the reinforcing bars will stick to the slope and will be located at the bottom of the bulging frame that will be formed. The strength of the bulging frame was not achieved.

Therefore, the inventors of the present invention investigated various methods to solve the above-mentioned problems, and found that in order to make the width of the horizontal frame constant and at the same time position the reinforcing bars at the center of the bulging frame body, the trapezoid shape was found. The present invention was achieved based on the idea that a simple formwork could be used.

(Means for Solving the Problems) That is, the present invention provides a structure in which a net-like body is stretched on a slope surface, and a mesh body is passed through the net-like body on the slope surface (a ceiling part with many open spaces and a pair of open spaces). A simple trapezoidal formwork is used, which is characterized in that the side parts are comb-shaped and the lower end is the free end. A cast-in-place frame construction method using a simple trapezoidal formwork, characterized in that the simple trapezoidal formwork is laid in the form of a lattice-shaped bulging frame body by spraying mortar or concrete on the trapezoidal simple formwork after completion of the laying. It is.

1 and 2 are perspective views showing an embodiment of a simple trapezoidal form (3) used in the present invention.

This mold formwork consists of a ceiling part (1) with many open spaces and a pair of side parts (2) with many open spaces. is an inverted U-shape.

The material for the simple trapezoidal formwork is usually metal wire such as iron, copper, or aluminum, but it is not limited to metal.

In addition, the lower the horizontal stripes (1)) on the sides of the simple trapezoid formwork, the weaker the strength, but the easier it is to follow the unevenness of the slope. This 5-6
Unroll the wire mesh (4) with a width of 1.5 cm, and dig into the shoulder of the wire mesh (the part that touches) and fix it with anchors, and in other parts, anchor only or with anchors at about 1 place every 1 to 3 m2. Use spacers to tighten it.

Once the above work is completed, place a simple trapezoidal formwork (3) with a width of 10 to 50 cm, a height of 4 to 10 cm, and a length of 1 to 5 m for 1 to 2 m with the free end of the side facing down. Lay it out in a corner grid pattern.

In this case, when laying the simple trapezoidal formwork in a lattice pattern, the intersection points should be spliced and the sides (if there are horizontal stripes, the sides should be separated by the width of the simple trapezoidal formwork). If the pieces are cut and there are no horizontal stripes, they may be left as is and laid out on top of each other, and these are tied together with wire and fixed with lath pins, etc., and then assembled.

Usually, one or several reinforcing bars (5) are placed on the simple table-shaped formwork laid as described above.

Once the above work is completed, spray low slump mortar or concrete onto the simple platform formwork to a width of 10-5mm.
A lattice-like bulging frame body (6) with a height of 10 to 50 cm and a height of 10 to 50 cm is formed to complete the legal frame.

The completed legal framework can also be used as an anchor beam to prevent landslides, and can also be used in combination with anchors.

(Function) The lattice-shaped bulging frame formed in this way is applied as a foundation work for vegetation construction, and plant seeds, fertilizers, etc.
By spraying a mixture of organic material, water retention material, and soil improvement material using a power sprayer to form a vegetation layer, it is possible to introduce vegetation on rock slopes, which was previously considered impossible. This greatly contributes to improving the landscape of the slope and permanently stabilizing the slope through the rhizomes of vegetation.

(Effects of the Invention) As described above, the present invention provides a structure in which a net-like body is stretched on a slope, and a ceiling portion with many open spaces (through the net-like body) and a pair of sides with many open spaces are provided on the slope surface. A simple trapezoidal formwork characterized in that the side portions are comb-shaped and the lower ends are free ends is laid in a grid pattern with the free ends of the side portions facing downward. , because it is a cast-in-place method of frame construction using a simple trapezoidal formwork, characterized in that after completion of laying, mortar or concrete is sprayed onto the simple trapezoidal formwork part to form a lattice-like bulging frame body. The width of spraying mortar or concrete has become clear, and it has become possible to form cast-in-place frames that meet the standards for frames.

In addition, since the reinforcing bars are placed on top of the simple trapezoidal formwork, the reinforcing bars are located at the center of the lattice-like bulging frame, which has the effect of forming a strong legal frame. .

[Brief explanation of the drawing]

FIGS. 1 and 2 are perspective views showing a simple trapezoidal formwork. FIG. 3 is a partial cross-sectional view showing the lattice-shaped bulging frame formed on a slope. In the figure, (1) is the ceiling part with many open spaces, (2) is the side part with many open spaces, (3) is the simple platform formwork, (4) is the wire mesh, and (5) is the side part with many open spaces.
) is a reinforcing bar, (6) is a lattice-like bulging frame, (30) is a slope,
(a) shows the free end of the side, and (b) shows the transverse strip of the side.

Claims (1)

[Scope of Claims] A net-like body is stretched over a slope, and the slope is made up of a ceiling portion that penetrates the net-like body and has many open spaces on the slope surface, and a pair of side parts that have many open spaces; A simple trapezoidal formwork characterized by a comb-like shape and a free end at the lower end is laid in a grid pattern with the free end of the side part facing downward, and after completion of the laying, the simple trapezoidal formwork is A cast-in-place frame construction method using a simple table-shaped formwork characterized by spraying mortar or concrete onto the formwork part to form a lattice-like bulging frame body.